pegmatite

Noun

Meaning

Graphic granite. See under Granite.

More generally, a coarse granite occurring as vein material in other rocks.

Synonyms

Hypernyms

Examples

Geochemistry Elbaite tourmaline (olive-green) and lepidolite mica (violet), from a lithium -enriched pegmatite in Brazil Pegmatite is difficult to sample representatively due to the large size of the constituent mineral crystals. Source: Internet

Columbite–tantalite minerals are most usually found as accessory minerals in pegmatite intrusions, and in alkaline intrusive rocks. Source: Internet

If the pegmatite fluid is rich in beryllium, crystals of beryl or chrysoberyl could form. Source: Internet

Hence, pegmatite is often characterised by sampling the individual minerals which comprise the pegmatite, and comparisons are made according to mineral chemistry. Source: Internet

In some locations, very coarse-grained pegmatite masses occur with granite. Source: Internet

Nomenclature Pegmatites can be classified according to the elements or mineral of interest, for instance "lithian pegmatite" to describe a Li-bearing or Li-mineral bearing pegmatite, or "boron pegmatite" for those containing tourmaline. Source: Internet

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